| details |
Late Kunda |
Aseri |
Estonia |
Magi,S. Locality 4:2 Cntika Clint |
1990 |
| details |
Kukruse |
|
USSR(Estonian SSR) |
Grahn,Y. et al. Precise chitinozoan dating of Ordovician impact events in Baltoscandia. |
1996 |
| details |
Nd |
|
Nd |
Miller,M.A. Chitinozoa. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Nd |
|
Nd |
Paris,F. et al. A revised chitinozoan classification |
1999 |
| details |
Late Ordovician |
|
Sweden |
Bergstrжm,S.M. et al. A proposed global boundary stratotype for the base of the Upper Series of the Ordovician System: The FҐgelsҐng section, Scania, southern Sweden. |
2000 |